my grandmother is 92, alert/oriented x3, frail, has heart disease, we were in ER this past sunday she was a little dehydrated, everything else normal, she is a DNR does not want to go to hospital, if she starts her dying process she will stay home, I live with her; right now she is having chest tightness, not pain, BP is 170/60 pulse is 70, should we try a nitro pill? or is her paremeters too low?